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Solea senegalensis vasa transcripts: molecular characterisation, tissue distribution and developmental expression
Tiziana Pacchiarini1, Ismael Cross, Ricardo B Leite
1Institute of Marine Science of Andalusia- ICMAN.CSIC, Av Republica Saharaui, 2, 11510 Puerto Real, Cádiz, Spain.
Reproduction, Fertility, and Development
|September 8, 2012
Summary
Researchers characterized the Vasa gene in Senegalese sole, identifying four transcripts. These Vasa mRNAs serve as valuable molecular markers for germ cells, aiding broodstock management and reproduction biotechnology in this species.
Area of Science:
- Molecular Biology
- Developmental Biology
- Aquaculture
Background:
- The Vasa gene, encoding an RNA helicase of the DEAD-box family, is critical for germ-cell lineage in diverse species.
- Vasa is a recognized molecular marker for germ cells and a tool in germ cell transplantation for broodstock production.
- Effective broodstock management is crucial for sustainable aquaculture, particularly in species like Senegalese sole.
Purpose of the Study:
- To characterize the Vasa gene in Senegalese sole (Solea senegalensis) for improved broodstock management.
- To investigate the expression patterns and potential roles of Vasa transcripts during development and gonad differentiation.
- To evaluate Vasa mRNAs as molecular markers for germ cells in Senegalese sole.
Main Methods:
- Isolation and sequencing of four Senegalese sole Vasa transcripts (Ssvasa1-4).
- Phylogenetic analysis to determine evolutionary conservation.
- Quantitative PCR (qPCR) for expression analysis in gonads and during development.
- In situ hybridization and immunohistochemistry on larvae.
Main Results:
- Four Vasa transcripts (Ssvasa1-4) were identified, showing high evolutionary conservation.
- Vasa transcripts were predominantly expressed in gonads, with Ssvasa3 and Ssvasa4 exhibiting ovary-specific expression.
- A developmental switch in transcript usage was observed, with maternal supply of Ssvasa1/2 and de novo expression of Ssvasa3/4.
- Vasa protein expression was detected in the germinal region of early gonads in 150-days after hatching larvae.
Conclusions:
- Ssvasa mRNAs are reliable molecular markers for primordial germ cells and germinal cells throughout development in Senegalese sole.
- Vasa mRNA expression patterns suggest involvement in gonad differentiation in this species.
- The study highlights the potential of Vasa gene characterization for advancing germ cell biotechnology and reproduction strategies in Senegalese sole.
